Solar System/Uranus

Uranus (pronounced YOUR-uh-nus or yuh-RAIN-us) is the seventh of the eight planets from the Sun and is the third largest — with a diameter of 51118 kilometers, it is just 3% larger than Neptune but 4.0 times as large as Earth. Uranus is one of the four gas giants. If Uranus had a solid surface and you stood on it, you would weigh 89% as much as you do on Earth.' Images of uranus

The rotational period of Uranus is 17 hours 14 minutes. The tilt of its axis based on prograde motion (motion in the direction of the orbit) is 97.86° from the perpendicular of its orbital plane. In other words, it is tilted by 82.14° and rotates retrograde. Because it is essentially tipped over on its side, almost all points on Uranus experience both a directly overhead noon Sun at times during the orbit and days when the Sun never rises at other times during the orbit. On Earth the former occurs in locations that are closer to the equator than 23.45° latitude because Earth's rotational axis is tilted 23.45° from the perpendicular of its orbital plane, and the latter occurs in locations that are closer than 23.45° degrees to the north or south pole. On Uranus the overhead Sun occurs at any location within 82.14° of the equator — that is, almost everywhere on the planet; and days without sunrise occur at any location within 82.14° of the north or south pole — again almost everywhere on the planet. Uranus is the only planet in the solar system having any locations that experience both types of event.